A:无效继承
B:遗嘱继承
C:法定继承
D:遗赠取得遗产
下列四组线段中,不构成比例线段的一组是 ( )
2.4+5.7____5.7+2.4 52.1+72.1-43.65____43.65+(72.1-52.1)
12.34-2.9____5.73+4.1 35.6+4.6+7.01____35.6+4.4+7.21
Hurry up, _______ you will miss the early bus.